SOME months back, with the national mood more “Up in the Air” than “Up,” there were doubts about ABC’s ability to sell commercial time during its presentation of the coming 82nd annual Academy Awards. Those worries were exacerbated by the low tune-in — 36.9 million viewers — for the 2009 show.

But three days before the broadcast, the spots are sold out, and at decent rates, considering the economy and last year’s ratings.